SharePoint Restore shows only Root Site Collection

Hello,

we're using NetBackup in the current version 7.6.1.2 to backup a SharePoint 2013 SP1 single server environment running on VMware. After struggling somewhile around to get the backup working - in the end we were experiencing the problem that the SharePoint Farm key did not get created automatically - god knows why. (Solved with - http://www.symantec.com/docs/TECH203759). Now the backup finishes without any error.

Now we have the problem that in the GRT restore selection only the root site collection is showing up. Anyway we have more then 20 sitecollections, all in the same Content Database, which are not showing up.

Could someone point me in the right direction what could be the reason for our problem?

Thanks in advance.

Matthias